"This rare lizard lives deep in the forests. It feeds on high-nutrient foods, giving it great vitality. When used to make elixirs, they temporarily increase your maximum hearts."

— In-Game Description

The Hearty Lizard (082 in the Hyrule Compendium) is a common material found in Breath of the Wild. They can typically be found on trees or in rocky areas around Hyrule such as the Gerudo Desert or Necluda Sea. They can be sold to shop-vendors all over Hyrule for 20 Rupees each. When cooked with monster parts, the resultant elixir will restore all hearts and temporarily increase the maximum number of hearts.